Improper Authorization in IBM API Connect Leading to Unauthorized Access
CVE-2026-19121

8.3HIGH

Key Information:

Vendor

IBM
Status
Api Connect
Vendor
CVE Published:
7 November 2026

What is CVE-2026-19121?

IBM API Connect versions 12.1.0.0 through 12.1.1.2 are susceptible to an improper authorization vulnerability. An attacker with valid authentication could exploit this issue to access resources belonging to other tenants, as the system fails to adequately verify the tenant context against the authenticated user. This flaw poses significant risks, allowing potential exposure of sensitive information and compromised tenant isolation.

Affected Version(s)

API Connect 12.1.0.0 <= 12.1.1.2

References

https://www.ibm.com/support/pages/node/7295635
vendor-advisorypatch

CVSS V3.1

Score:
8.3
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.